| 摘要 |
<p>A method for simplifying the arithmetic operation of the global motion compensation and warping prediction in encoding and decoding the image signal of motion compensation. In a process for synthesizing a predicted image (1203) subjected to global motion compensation and formed to predict the present frame image from a previous frame image (1202) by using moving vectors (1205) of representative points which are spaced at spacial intervals having specific features in an image frame, the moving vectors of provisional representative points are determined from the moving vectors (1206) of the representative points by first interpolation/exterpolation processes (1207), and then the moving vectors (1210) of the pixels are determined from the moving vectors (1208) of the provisional representative points by second interpolation/exterpolation processes (1209). Since the division for synthesizing the predicted image is substituted by a shift calculation with a small number of bits shifted, the processing with a computer or an exclusive hardware can be simplified.</p> |
